Preparation and characterization of spherical lignocellulose-based anion exchanger from sugarcane bagasse

Biosorption is considered a promising technique for removing heavy metals from water. However, biosorbent usually prepared in the form of biomass powder that has drawbacks stability and uniformity. Herein, spherical lignocellulose-based anion exchanger (LCB-AE) was sugarcane bagasse through method dissolution-regeneration followed by quaternary ammonium modification. Dissolution-regeneration conditions raw were optimized, materials characterized element composition analysis, pore-structure analysis (mercury intrusion porosimetry), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), carbon-13 nuclear magnetic resonance (13C-NMR) analyses. The LCB-AE macro-porous structure rough surface occupied mainly hydroxyl groups. Adsorption selectivity follows order CrO42- > PO43- SO42- NO3-, adsorption isotherms agree well with Langmuir model, which suggests experimental exchange abilities are approximately 0.8 to 0.9 mEq/g. These results show as new potential be used anions removal